package csu.web.mypetstore.persistence.impl;

import csu.web.mypetstore.domain.Item;
import csu.web.mypetstore.domain.Product;
import csu.web.mypetstore.persistence.DBUtil;
import csu.web.mypetstore.persistence.ItemDao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class ItemDaoImpl implements ItemDao {
    private static final String UPDATE_INVENTORY_QUANTITY =
            "UPDATE INVENTORY SET QTY = QTY - ? WHERE ITEMID = ?";

    private static final String GET_INVENTORY_QUANTITY =
            "SELECT QTY AS QUANTITY FROM INVENTORY WHERE ITEMID = ?";

    private static final String GET_ITEM_LIST_BY_PRODUCT =
            "SELECT I.ITEMID,LISTPRICE,UNITCOST,SUPPLIER AS supplierId,I.PRODUCTID AS productId,NAME AS productName,DESCN AS productDescription,CATEGORY AS categoryId,STATUS,ATTR1 AS attribute1,ATTR2 AS attribute2,ATTR3 AS attribute3,ATTR4 AS attribute4,ATTR5 AS attribute5 FROM ITEM I, PRODUCT P WHERE P.PRODUCTID = I.PRODUCTID AND I.PRODUCTID = ?";

    private static final String GET_ITEM =
            "select I.ITEMID,LISTPRICE,UNITCOST,SUPPLIER AS supplierId,I.PRODUCTID AS productId,NAME AS productName,DESCN AS productDescription,CATEGORY AS CategoryId,STATUS,ATTR1 AS attribute1,ATTR2 AS attribute2,ATTR3 AS attribute3,ATTR4 AS attribute4,ATTR5 AS attribute5,QTY AS quantity from ITEM I, INVENTORY V, PRODUCT P where P.PRODUCTID = I.PRODUCTID and I.ITEMID = V.ITEMID and I.ITEMID=?";

//    @Override
//    public void updateInventoryQuantity(Map<String, Object> param) {
//        try {
//            Connection connection = DBUtil.getConnection();
//            PreparedStatement pStatement = connection
//                    .prepareStatement(UPDATE_INVENTORY_QUANTITY);
//            String itemId = param.keySet().iterator().next();
//            Integer increment = (Integer) param.get(itemId);
//            pStatement.setInt(1, increment.intValue());
//            pStatement.setString(2, itemId);
//            pStatement.executeUpdate();
//            DBUtil.closePreparedStatement(pStatement);
//            DBUtil.closeConnection(connection);
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//    }

    public void updateInventoryQuantity(Map<String, Object> param) {
        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement pStatement = connection
                    .prepareStatement(UPDATE_INVENTORY_QUANTITY);
            String itemId = param.keySet().iterator().next();
            Integer increment = Integer.valueOf((String) param.get("increment"));
            pStatement.setInt(1, increment.intValue());
            pStatement.setString(2, itemId);
            pStatement.executeUpdate();
            DBUtil.closePreparedStatement(pStatement);
            DBUtil.closeConnection(connection);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


        @Override
    public int getInventoryQuantity(String itemId) {
        int result = -1;
        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement pStatement = connection
                    .prepareStatement(GET_INVENTORY_QUANTITY);
            pStatement.setString(1, itemId);
            ResultSet resultSet = pStatement.executeQuery();
            if (resultSet.next()) {
                result = resultSet.getInt("QUANTITY");
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(pStatement);
            DBUtil.closeConnection(connection);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    @Override
    public List<Item> getItemListByProduct(String productId) {
        List<Item> itemList = new ArrayList<>();
        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement pStatement = connection
                    .prepareStatement(GET_ITEM_LIST_BY_PRODUCT);
            pStatement.setString(1, productId);
            ResultSet resultSet = pStatement.executeQuery();
            while (resultSet.next()) {
                Item item = new Item();
                item.setItemId(resultSet.getString(1));
                item.setListPrice(resultSet.getBigDecimal(2));
                item.setUnitCost(resultSet.getBigDecimal(3));
                item.setSupplierId(resultSet.getInt(4));
                Product product = new Product();
                product.setProductId(resultSet.getString(5));
                product.setName(resultSet.getString(6));
                product.setDescription(resultSet.getString(7));
                product.setCategoryId(resultSet.getString(8));
                item.setProduct(product);
                item.setStatus(resultSet.getString(9));
                item.setAttribute1(resultSet.getString(10));
                item.setAttribute2(resultSet.getString(11));
                item.setAttribute3(resultSet.getString(12));
                item.setAttribute4(resultSet.getString(13));
                item.setAttribute5(resultSet.getString(14));
                itemList.add(item);
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(pStatement);
            DBUtil.closeResultSet(resultSet);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return itemList;
    }

    @Override
    public Item getItem(String itemId) {
        Item item = null;
        try {
            Connection connection = DBUtil.getConnection();
            PreparedStatement pStatement = connection
                    .prepareStatement(GET_ITEM);
            pStatement.setString(1, itemId);
            ResultSet resultSet = pStatement.executeQuery();
            if (resultSet.next()) {
                item = new Item();
                item.setItemId(resultSet.getString(1));
                item.setListPrice(resultSet.getBigDecimal(2));
                item.setUnitCost(resultSet.getBigDecimal(3));
                item.setSupplierId(resultSet.getInt(4));
                Product product = new Product();
                product.setProductId(resultSet.getString(5));
                product.setName(resultSet.getString(6));
                product.setDescription(resultSet.getString(7));
                product.setCategoryId(resultSet.getString(8));
                item.setProduct(product);
                item.setStatus(resultSet.getString(9));
                item.setAttribute1(resultSet.getString(10));
                item.setAttribute2(resultSet.getString(11));
                item.setAttribute3(resultSet.getString(12));
                item.setAttribute4(resultSet.getString(13));
                item.setAttribute5(resultSet.getString(14));
                item.setQuantity(resultSet.getInt(15));
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(pStatement);
            DBUtil.closeConnection(connection);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return item;
    }
}
